Abstract
To analyze the correctness and the performance of a program, information about the dynamic behavior of all participating processes is needed. The dynamic behavior can be modeled as a stream of events required for a later analysis including appropriate attributes. Based on this idea, kojak, a trace-based toolkit for performance analysis, records and analyzes the activities of mpi-1 point-to-point and collective communication.
To support remote-memory access (rma) hardware in a portable way, mpi-2 introduced a standardized interface for remote memory access. However, potential performance gains come at the expense of more complex semantics. From a programmer’s point of view, an mpi-2 data transfer is only completed after a sequence of communication and associated synchronization calls.
This paper describes the integration of performance measurement and analysis methods for rma communication into the kojak toolkit. Special emphasis is put on the underlying event model used to represent the dynamic behavior of mpi-2 rma operations. We show that our model reflects the relationships between communication and synchronization more accurately than existing models. In addition, the model is general enough to also cover alternate but simpler rma interfaces, such as shmem and Co-Array Fortran.
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Keywords
- Message Passing Interface
- Origin Process
- Event Trace
- Message Passing Interface Performance
- Remote Memory Access
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Hermanns, MA., Mohr, B., Wolf, F. (2005). Event-Based Measurement and Analysis of One-Sided Communication. In: Cunha, J.C., Medeiros, P.D. (eds) Euro-Par 2005 Parallel Processing. Euro-Par 2005. Lecture Notes in Computer Science, vol 3648. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11549468_20
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DOI: https://doi.org/10.1007/11549468_20
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